Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Barbara's impulsive activation of the teleportation device in The Sea of Death (Episode 21) results in her abduction, which directly triggers the crisis in The Velvet Web (Episode 22) where Ian forces the Doctor to act upon discovering bloodstained evidence of Barbara's abduction."
inferred by llm_cross_episode_arc
Why This Matters Across Episodes
The longer arc this connection carries
The abduction of Barbara in Episode 21 is the inciting incident that propels the crew into the events of Episode 22. Without Barbara's disappearance, Ian would not have the bloodstained strap to force the Doctor's hand, demonstrating how Barbara's absence escalates the Doctor-Ian conflict in the next episode.
About Causal Connections
A directly causes B. The first event sets forces in motion that produce the second. These are the load-bearing connections of plot--remove one and the story structure collapses.